drivers/iio/accel/st_accel_core.c

   1 /*
   2  * STMicroelectronics accelerometers driver
   3  *
   4  * Copyright 2012-2013 STMicroelectronics Inc.
   5  *
   6  * Denis Ciocca <denis.ciocca@st.com>
   7  *
   8  * Licensed under the GPL-2.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/slab.h>
  14 #include <linux/errno.h>
  15 #include <linux/types.h>
  16 #include <linux/mutex.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/i2c.h>
  19 #include <linux/gpio.h>
  20 #include <linux/irq.h>
  21 #include <linux/iio/iio.h>
  22 #include <linux/iio/sysfs.h>
  23 #include <linux/iio/trigger.h>
  24 #include <linux/iio/buffer.h>
  25
  26 #include <linux/iio/common/st_sensors.h>
  27 #include "st_accel.h"
  28
  29 #define ST_ACCEL_NUMBER_DATA_CHANNELS           3
  30
  31 /* DEFAULT VALUE FOR SENSORS */
  32 #define ST_ACCEL_DEFAULT_OUT_X_L_ADDR           0x28
  33 #define ST_ACCEL_DEFAULT_OUT_Y_L_ADDR           0x2a
  34 #define ST_ACCEL_DEFAULT_OUT_Z_L_ADDR           0x2c
  35
  36 /* FULLSCALE */
  37 #define ST_ACCEL_FS_AVL_2G                      2
  38 #define ST_ACCEL_FS_AVL_4G                      4
  39 #define ST_ACCEL_FS_AVL_6G                      6
  40 #define ST_ACCEL_FS_AVL_8G                      8
  41 #define ST_ACCEL_FS_AVL_16G                     16
  42
  43 /* CUSTOM VALUES FOR SENSOR 1 */
  44 #define ST_ACCEL_1_WAI_EXP                      0x33
  45 #define ST_ACCEL_1_ODR_ADDR                     0x20
  46 #define ST_ACCEL_1_ODR_MASK                     0xf0
  47 #define ST_ACCEL_1_ODR_AVL_1HZ_VAL              0x01
  48 #define ST_ACCEL_1_ODR_AVL_10HZ_VAL             0x02
  49 #define ST_ACCEL_1_ODR_AVL_25HZ_VAL             0x03
  50 #define ST_ACCEL_1_ODR_AVL_50HZ_VAL             0x04
  51 #define ST_ACCEL_1_ODR_AVL_100HZ_VAL            0x05
  52 #define ST_ACCEL_1_ODR_AVL_200HZ_VAL            0x06
  53 #define ST_ACCEL_1_ODR_AVL_400HZ_VAL            0x07
  54 #define ST_ACCEL_1_ODR_AVL_1600HZ_VAL           0x08
  55 #define ST_ACCEL_1_FS_ADDR                      0x23
  56 #define ST_ACCEL_1_FS_MASK                      0x30
  57 #define ST_ACCEL_1_FS_AVL_2_VAL                 0x00
  58 #define ST_ACCEL_1_FS_AVL_4_VAL                 0x01
  59 #define ST_ACCEL_1_FS_AVL_8_VAL                 0x02
  60 #define ST_ACCEL_1_FS_AVL_16_VAL                0x03
  61 #define ST_ACCEL_1_FS_AVL_2_GAIN                IIO_G_TO_M_S_2(1000)
  62 #define ST_ACCEL_1_FS_AVL_4_GAIN                IIO_G_TO_M_S_2(2000)
  63 #define ST_ACCEL_1_FS_AVL_8_GAIN                IIO_G_TO_M_S_2(4000)
  64 #define ST_ACCEL_1_FS_AVL_16_GAIN               IIO_G_TO_M_S_2(12000)
  65 #define ST_ACCEL_1_BDU_ADDR                     0x23
  66 #define ST_ACCEL_1_BDU_MASK                     0x80
  67 #define ST_ACCEL_1_DRDY_IRQ_ADDR                0x22
  68 #define ST_ACCEL_1_DRDY_IRQ_INT1_MASK           0x10
  69 #define ST_ACCEL_1_DRDY_IRQ_INT2_MASK           0x08
  70 #define ST_ACCEL_1_MULTIREAD_BIT                true
  71
  72 /* CUSTOM VALUES FOR SENSOR 2 */
  73 #define ST_ACCEL_2_WAI_EXP                      0x32
  74 #define ST_ACCEL_2_ODR_ADDR                     0x20
  75 #define ST_ACCEL_2_ODR_MASK                     0x18
  76 #define ST_ACCEL_2_ODR_AVL_50HZ_VAL             0x00
  77 #define ST_ACCEL_2_ODR_AVL_100HZ_VAL            0x01
  78 #define ST_ACCEL_2_ODR_AVL_400HZ_VAL            0x02
  79 #define ST_ACCEL_2_ODR_AVL_1000HZ_VAL           0x03
  80 #define ST_ACCEL_2_PW_ADDR                      0x20
  81 #define ST_ACCEL_2_PW_MASK                      0xe0
  82 #define ST_ACCEL_2_FS_ADDR                      0x23
  83 #define ST_ACCEL_2_FS_MASK                      0x30
  84 #define ST_ACCEL_2_FS_AVL_2_VAL                 0X00
  85 #define ST_ACCEL_2_FS_AVL_4_VAL                 0X01
  86 #define ST_ACCEL_2_FS_AVL_8_VAL                 0x03
  87 #define ST_ACCEL_2_FS_AVL_2_GAIN                IIO_G_TO_M_S_2(1000)
  88 #define ST_ACCEL_2_FS_AVL_4_GAIN                IIO_G_TO_M_S_2(2000)
  89 #define ST_ACCEL_2_FS_AVL_8_GAIN                IIO_G_TO_M_S_2(3900)
  90 #define ST_ACCEL_2_BDU_ADDR                     0x23
  91 #define ST_ACCEL_2_BDU_MASK                     0x80
  92 #define ST_ACCEL_2_DRDY_IRQ_ADDR                0x22
  93 #define ST_ACCEL_2_DRDY_IRQ_INT1_MASK           0x02
  94 #define ST_ACCEL_2_DRDY_IRQ_INT2_MASK           0x10
  95 #define ST_ACCEL_2_MULTIREAD_BIT                true
  96
  97 /* CUSTOM VALUES FOR SENSOR 3 */
  98 #define ST_ACCEL_3_WAI_EXP                      0x40
  99 #define ST_ACCEL_3_ODR_ADDR                     0x20
 100 #define ST_ACCEL_3_ODR_MASK                     0xf0
 101 #define ST_ACCEL_3_ODR_AVL_3HZ_VAL              0x01
 102 #define ST_ACCEL_3_ODR_AVL_6HZ_VAL              0x02
 103 #define ST_ACCEL_3_ODR_AVL_12HZ_VAL             0x03
 104 #define ST_ACCEL_3_ODR_AVL_25HZ_VAL             0x04
 105 #define ST_ACCEL_3_ODR_AVL_50HZ_VAL             0x05
 106 #define ST_ACCEL_3_ODR_AVL_100HZ_VAL            0x06
 107 #define ST_ACCEL_3_ODR_AVL_200HZ_VAL            0x07
 108 #define ST_ACCEL_3_ODR_AVL_400HZ_VAL            0x08
 109 #define ST_ACCEL_3_ODR_AVL_800HZ_VAL            0x09
 110 #define ST_ACCEL_3_ODR_AVL_1600HZ_VAL           0x0a
 111 #define ST_ACCEL_3_FS_ADDR                      0x24
 112 #define ST_ACCEL_3_FS_MASK                      0x38
 113 #define ST_ACCEL_3_FS_AVL_2_VAL                 0X00
 114 #define ST_ACCEL_3_FS_AVL_4_VAL                 0X01
 115 #define ST_ACCEL_3_FS_AVL_6_VAL                 0x02
 116 #define ST_ACCEL_3_FS_AVL_8_VAL                 0x03
 117 #define ST_ACCEL_3_FS_AVL_16_VAL                0x04
 118 #define ST_ACCEL_3_FS_AVL_2_GAIN                IIO_G_TO_M_S_2(61)
 119 #define ST_ACCEL_3_FS_AVL_4_GAIN                IIO_G_TO_M_S_2(122)
 120 #define ST_ACCEL_3_FS_AVL_6_GAIN                IIO_G_TO_M_S_2(183)
 121 #define ST_ACCEL_3_FS_AVL_8_GAIN                IIO_G_TO_M_S_2(244)
 122 #define ST_ACCEL_3_FS_AVL_16_GAIN               IIO_G_TO_M_S_2(732)
 123 #define ST_ACCEL_3_BDU_ADDR                     0x20
 124 #define ST_ACCEL_3_BDU_MASK                     0x08
 125 #define ST_ACCEL_3_DRDY_IRQ_ADDR                0x23
 126 #define ST_ACCEL_3_DRDY_IRQ_INT1_MASK           0x80
 127 #define ST_ACCEL_3_DRDY_IRQ_INT2_MASK           0x00
 128 #define ST_ACCEL_3_IG1_EN_ADDR                  0x23
 129 #define ST_ACCEL_3_IG1_EN_MASK                  0x08
 130 #define ST_ACCEL_3_MULTIREAD_BIT                false
 131
 132 static const struct iio_chan_spec st_accel_12bit_channels[] = {
 133         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
 134                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 135                         ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 12, 16,
 136                         ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
 137         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
 138                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 139                         ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 12, 16,
 140                         ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
 141         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
 142                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 143                         ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 12, 16,
 144                         ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
 145         IIO_CHAN_SOFT_TIMESTAMP(3)
 146 };
 147
 148 static const struct iio_chan_spec st_accel_16bit_channels[] = {
 149         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
 150                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 151                         ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
 152                         ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
 153         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
 154                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 155                         ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
 156                         ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
 157         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
 158                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 159                         ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
 160                         ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
 161         IIO_CHAN_SOFT_TIMESTAMP(3)
 162 };
 163
 164 static const struct st_sensors st_accel_sensors[] = {
 165         {
 166                 .wai = ST_ACCEL_1_WAI_EXP,
 167                 .sensors_supported = {
 168                         [0] = LIS3DH_ACCEL_DEV_NAME,
 169                         [1] = LSM303DLHC_ACCEL_DEV_NAME,
 170                         [2] = LSM330D_ACCEL_DEV_NAME,
 171                         [3] = LSM330DL_ACCEL_DEV_NAME,
 172                         [4] = LSM330DLC_ACCEL_DEV_NAME,
 173                 },
 174                 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
 175                 .odr = {
 176                         .addr = ST_ACCEL_1_ODR_ADDR,
 177                         .mask = ST_ACCEL_1_ODR_MASK,
 178                         .odr_avl = {
 179                                 { 1, ST_ACCEL_1_ODR_AVL_1HZ_VAL, },
 180                                 { 10, ST_ACCEL_1_ODR_AVL_10HZ_VAL, },
 181                                 { 25, ST_ACCEL_1_ODR_AVL_25HZ_VAL, },
 182                                 { 50, ST_ACCEL_1_ODR_AVL_50HZ_VAL, },
 183                                 { 100, ST_ACCEL_1_ODR_AVL_100HZ_VAL, },
 184                                 { 200, ST_ACCEL_1_ODR_AVL_200HZ_VAL, },
 185                                 { 400, ST_ACCEL_1_ODR_AVL_400HZ_VAL, },
 186                                 { 1600, ST_ACCEL_1_ODR_AVL_1600HZ_VAL, },
 187                         },
 188                 },
 189                 .pw = {
 190                         .addr = ST_ACCEL_1_ODR_ADDR,
 191                         .mask = ST_ACCEL_1_ODR_MASK,
 192                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 193                 },
 194                 .enable_axis = {
 195                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 196                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 197                 },
 198                 .fs = {
 199                         .addr = ST_ACCEL_1_FS_ADDR,
 200                         .mask = ST_ACCEL_1_FS_MASK,
 201                         .fs_avl = {
 202                                 [0] = {
 203                                         .num = ST_ACCEL_FS_AVL_2G,
 204                                         .value = ST_ACCEL_1_FS_AVL_2_VAL,
 205                                         .gain = ST_ACCEL_1_FS_AVL_2_GAIN,
 206                                 },
 207                                 [1] = {
 208                                         .num = ST_ACCEL_FS_AVL_4G,
 209                                         .value = ST_ACCEL_1_FS_AVL_4_VAL,
 210                                         .gain = ST_ACCEL_1_FS_AVL_4_GAIN,
 211                                 },
 212                                 [2] = {
 213                                         .num = ST_ACCEL_FS_AVL_8G,
 214                                         .value = ST_ACCEL_1_FS_AVL_8_VAL,
 215                                         .gain = ST_ACCEL_1_FS_AVL_8_GAIN,
 216                                 },
 217                                 [3] = {
 218                                         .num = ST_ACCEL_FS_AVL_16G,
 219                                         .value = ST_ACCEL_1_FS_AVL_16_VAL,
 220                                         .gain = ST_ACCEL_1_FS_AVL_16_GAIN,
 221                                 },
 222                         },
 223                 },
 224                 .bdu = {
 225                         .addr = ST_ACCEL_1_BDU_ADDR,
 226                         .mask = ST_ACCEL_1_BDU_MASK,
 227                 },
 228                 .drdy_irq = {
 229                         .addr = ST_ACCEL_1_DRDY_IRQ_ADDR,
 230                         .mask_int1 = ST_ACCEL_1_DRDY_IRQ_INT1_MASK,
 231                         .mask_int2 = ST_ACCEL_1_DRDY_IRQ_INT2_MASK,
 232                 },
 233                 .multi_read_bit = ST_ACCEL_1_MULTIREAD_BIT,
 234                 .bootime = 2,
 235         },
 236         {
 237                 .wai = ST_ACCEL_2_WAI_EXP,
 238                 .sensors_supported = {
 239                         [0] = LIS331DLH_ACCEL_DEV_NAME,
 240                         [1] = LSM303DL_ACCEL_DEV_NAME,
 241                         [2] = LSM303DLH_ACCEL_DEV_NAME,
 242                         [3] = LSM303DLM_ACCEL_DEV_NAME,
 243                 },
 244                 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
 245                 .odr = {
 246                         .addr = ST_ACCEL_2_ODR_ADDR,
 247                         .mask = ST_ACCEL_2_ODR_MASK,
 248                         .odr_avl = {
 249                                 { 50, ST_ACCEL_2_ODR_AVL_50HZ_VAL, },
 250                                 { 100, ST_ACCEL_2_ODR_AVL_100HZ_VAL, },
 251                                 { 400, ST_ACCEL_2_ODR_AVL_400HZ_VAL, },
 252                                 { 1000, ST_ACCEL_2_ODR_AVL_1000HZ_VAL, },
 253                         },
 254                 },
 255                 .pw = {
 256                         .addr = ST_ACCEL_2_PW_ADDR,
 257                         .mask = ST_ACCEL_2_PW_MASK,
 258                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 259                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 260                 },
 261                 .enable_axis = {
 262                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 263                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 264                 },
 265                 .fs = {
 266                         .addr = ST_ACCEL_2_FS_ADDR,
 267                         .mask = ST_ACCEL_2_FS_MASK,
 268                         .fs_avl = {
 269                                 [0] = {
 270                                         .num = ST_ACCEL_FS_AVL_2G,
 271                                         .value = ST_ACCEL_2_FS_AVL_2_VAL,
 272                                         .gain = ST_ACCEL_2_FS_AVL_2_GAIN,
 273                                 },
 274                                 [1] = {
 275                                         .num = ST_ACCEL_FS_AVL_4G,
 276                                         .value = ST_ACCEL_2_FS_AVL_4_VAL,
 277                                         .gain = ST_ACCEL_2_FS_AVL_4_GAIN,
 278                                 },
 279                                 [2] = {
 280                                         .num = ST_ACCEL_FS_AVL_8G,
 281                                         .value = ST_ACCEL_2_FS_AVL_8_VAL,
 282                                         .gain = ST_ACCEL_2_FS_AVL_8_GAIN,
 283                                 },
 284                         },
 285                 },
 286                 .bdu = {
 287                         .addr = ST_ACCEL_2_BDU_ADDR,
 288                         .mask = ST_ACCEL_2_BDU_MASK,
 289                 },
 290                 .drdy_irq = {
 291                         .addr = ST_ACCEL_2_DRDY_IRQ_ADDR,
 292                         .mask_int1 = ST_ACCEL_2_DRDY_IRQ_INT1_MASK,
 293                         .mask_int2 = ST_ACCEL_2_DRDY_IRQ_INT2_MASK,
 294                 },
 295                 .multi_read_bit = ST_ACCEL_2_MULTIREAD_BIT,
 296                 .bootime = 2,
 297         },
 298         {
 299                 .wai = ST_ACCEL_3_WAI_EXP,
 300                 .sensors_supported = {
 301                         [0] = LSM330_ACCEL_DEV_NAME,
 302                 },
 303                 .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
 304                 .odr = {
 305                         .addr = ST_ACCEL_3_ODR_ADDR,
 306                         .mask = ST_ACCEL_3_ODR_MASK,
 307                         .odr_avl = {
 308                                 { 3, ST_ACCEL_3_ODR_AVL_3HZ_VAL },
 309                                 { 6, ST_ACCEL_3_ODR_AVL_6HZ_VAL, },
 310                                 { 12, ST_ACCEL_3_ODR_AVL_12HZ_VAL, },
 311                                 { 25, ST_ACCEL_3_ODR_AVL_25HZ_VAL, },
 312                                 { 50, ST_ACCEL_3_ODR_AVL_50HZ_VAL, },
 313                                 { 100, ST_ACCEL_3_ODR_AVL_100HZ_VAL, },
 314                                 { 200, ST_ACCEL_3_ODR_AVL_200HZ_VAL, },
 315                                 { 400, ST_ACCEL_3_ODR_AVL_400HZ_VAL, },
 316                                 { 800, ST_ACCEL_3_ODR_AVL_800HZ_VAL, },
 317                                 { 1600, ST_ACCEL_3_ODR_AVL_1600HZ_VAL, },
 318                         },
 319                 },
 320                 .pw = {
 321                         .addr = ST_ACCEL_3_ODR_ADDR,
 322                         .mask = ST_ACCEL_3_ODR_MASK,
 323                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 324                 },
 325                 .enable_axis = {
 326                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 327                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 328                 },
 329                 .fs = {
 330                         .addr = ST_ACCEL_3_FS_ADDR,
 331                         .mask = ST_ACCEL_3_FS_MASK,
 332                         .fs_avl = {
 333                                 [0] = {
 334                                         .num = ST_ACCEL_FS_AVL_2G,
 335                                         .value = ST_ACCEL_3_FS_AVL_2_VAL,
 336                                         .gain = ST_ACCEL_3_FS_AVL_2_GAIN,
 337                                 },
 338                                 [1] = {
 339                                         .num = ST_ACCEL_FS_AVL_4G,
 340                                         .value = ST_ACCEL_3_FS_AVL_4_VAL,
 341                                         .gain = ST_ACCEL_3_FS_AVL_4_GAIN,
 342                                 },
 343                                 [2] = {
 344                                         .num = ST_ACCEL_FS_AVL_6G,
 345                                         .value = ST_ACCEL_3_FS_AVL_6_VAL,
 346                                         .gain = ST_ACCEL_3_FS_AVL_6_GAIN,
 347                                 },
 348                                 [3] = {
 349                                         .num = ST_ACCEL_FS_AVL_8G,
 350                                         .value = ST_ACCEL_3_FS_AVL_8_VAL,
 351                                         .gain = ST_ACCEL_3_FS_AVL_8_GAIN,
 352                                 },
 353                                 [4] = {
 354                                         .num = ST_ACCEL_FS_AVL_16G,
 355                                         .value = ST_ACCEL_3_FS_AVL_16_VAL,
 356                                         .gain = ST_ACCEL_3_FS_AVL_16_GAIN,
 357                                 },
 358                         },
 359                 },
 360                 .bdu = {
 361                         .addr = ST_ACCEL_3_BDU_ADDR,
 362                         .mask = ST_ACCEL_3_BDU_MASK,
 363                 },
 364                 .drdy_irq = {
 365                         .addr = ST_ACCEL_3_DRDY_IRQ_ADDR,
 366                         .mask_int1 = ST_ACCEL_3_DRDY_IRQ_INT1_MASK,
 367                         .mask_int2 = ST_ACCEL_3_DRDY_IRQ_INT2_MASK,
 368                         .ig1 = {
 369                                 .en_addr = ST_ACCEL_3_IG1_EN_ADDR,
 370                                 .en_mask = ST_ACCEL_3_IG1_EN_MASK,
 371                         },
 372                 },
 373                 .multi_read_bit = ST_ACCEL_3_MULTIREAD_BIT,
 374                 .bootime = 2,
 375         },
 376 };
 377
 378 static int st_accel_read_raw(struct iio_dev *indio_dev,
 379                         struct iio_chan_spec const *ch, int *val,
 380                                                         int *val2, long mask)
 381 {
 382         int err;
 383         struct st_sensor_data *adata = iio_priv(indio_dev);
 384
 385         switch (mask) {
 386         case IIO_CHAN_INFO_RAW:
 387                 err = st_sensors_read_info_raw(indio_dev, ch, val);
 388                 if (err < 0)
 389                         goto read_error;
 390
 391                 return IIO_VAL_INT;
 392         case IIO_CHAN_INFO_SCALE:
 393                 *val = 0;
 394                 *val2 = adata->current_fullscale->gain;
 395                 return IIO_VAL_INT_PLUS_MICRO;
 396         default:
 397                 return -EINVAL;
 398         }
 399
 400 read_error:
 401         return err;
 402 }
 403
 404 static int st_accel_write_raw(struct iio_dev *indio_dev,
 405                 struct iio_chan_spec const *chan, int val, int val2, long mask)
 406 {
 407         int err;
 408
 409         switch (mask) {
 410         case IIO_CHAN_INFO_SCALE:
 411                 err = st_sensors_set_fullscale_by_gain(indio_dev, val2);
 412                 break;
 413         default:
 414                 return -EINVAL;
 415         }
 416
 417         return err;
 418 }
 419
 420 static ST_SENSOR_DEV_ATTR_SAMP_FREQ();
 421 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
 422 static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available);
 423
 424 static struct attribute *st_accel_attributes[] = {
 425         &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
 426         &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
 427         &iio_dev_attr_sampling_frequency.dev_attr.attr,
 428         NULL,
 429 };
 430
 431 static const struct attribute_group st_accel_attribute_group = {
 432         .attrs = st_accel_attributes,
 433 };
 434
 435 static const struct iio_info accel_info = {
 436         .driver_module = THIS_MODULE,
 437         .attrs = &st_accel_attribute_group,
 438         .read_raw = &st_accel_read_raw,
 439         .write_raw = &st_accel_write_raw,
 440 };
 441
 442 #ifdef CONFIG_IIO_TRIGGER
 443 static const struct iio_trigger_ops st_accel_trigger_ops = {
 444         .owner = THIS_MODULE,
 445         .set_trigger_state = ST_ACCEL_TRIGGER_SET_STATE,
 446 };
 447 #define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops)
 448 #else
 449 #define ST_ACCEL_TRIGGER_OPS NULL
 450 #endif
 451
 452 int st_accel_common_probe(struct iio_dev *indio_dev,
 453                                 struct st_sensors_platform_data *plat_data)
 454 {
 455         struct st_sensor_data *adata = iio_priv(indio_dev);
 456         int irq = adata->get_irq_data_ready(indio_dev);
 457         int err;
 458
 459         indio_dev->modes = INDIO_DIRECT_MODE;
 460         indio_dev->info = &accel_info;
 461
 462         err = st_sensors_check_device_support(indio_dev,
 463                                 ARRAY_SIZE(st_accel_sensors), st_accel_sensors);
 464         if (err < 0)
 465                 return err;
 466
 467         adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS;
 468         adata->multiread_bit = adata->sensor->multi_read_bit;
 469         indio_dev->channels = adata->sensor->ch;
 470         indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
 471
 472         adata->current_fullscale = (struct st_sensor_fullscale_avl *)
 473                                                 &adata->sensor->fs.fs_avl[0];
 474         adata->odr = adata->sensor->odr.odr_avl[0].hz;
 475
 476         if (!plat_data)
 477                 plat_data =
 478                         (struct st_sensors_platform_data *)&default_accel_pdata;
 479
 480         err = st_sensors_init_sensor(indio_dev, plat_data);
 481         if (err < 0)
 482                 return err;
 483
 484         err = st_accel_allocate_ring(indio_dev);
 485         if (err < 0)
 486                 return err;
 487
 488         if (irq > 0) {
 489                 err = st_sensors_allocate_trigger(indio_dev,
 490                                                  ST_ACCEL_TRIGGER_OPS);
 491                 if (err < 0)
 492                         goto st_accel_probe_trigger_error;
 493         }
 494
 495         err = iio_device_register(indio_dev);
 496         if (err)
 497                 goto st_accel_device_register_error;
 498
 499         return 0;
 500
 501 st_accel_device_register_error:
 502         if (irq > 0)
 503                 st_sensors_deallocate_trigger(indio_dev);
 504 st_accel_probe_trigger_error:
 505         st_accel_deallocate_ring(indio_dev);
 506
 507         return err;
 508 }
 509 EXPORT_SYMBOL(st_accel_common_probe);
 510
 511 void st_accel_common_remove(struct iio_dev *indio_dev)
 512 {
 513         struct st_sensor_data *adata = iio_priv(indio_dev);
 514
 515         iio_device_unregister(indio_dev);
 516         if (adata->get_irq_data_ready(indio_dev) > 0)
 517                 st_sensors_deallocate_trigger(indio_dev);
 518
 519         st_accel_deallocate_ring(indio_dev);
 520 }
 521 EXPORT_SYMBOL(st_accel_common_remove);
 522
 523 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 524 MODULE_DESCRIPTION("STMicroelectronics accelerometers driver");
 525 MODULE_LICENSE("GPL v2");